I’d paint the vanity a bit darker and the walls a more complementary color to the tiles and counter (be sure to test a few shades before you commit). Lighting, hardware, and mirror choices are also key.

Thank you Maureen, and I like your suggestion. I will model it. When I was asking AI, it suggested to possibly use a darker shade of greige also.

I think I am sold on shades of greige :) because all the other colors I tried just popped too much.

The walls will be repainted last after I get everything installed but I like your suggestion there also. My fixtures are brushed nickel and I am locked into that unless I want to order a new custom shower door. It is not a standard size either. Using Maple instead of White Oak will save me at least $800 and not having to replace the shower door will save almost that much. Thank you again

Good to hear! You can mix metals, if interested.

I don't have any advice for you, I just want to cheer you on. You've really tackled solving your problems and are doing great!

I would definitely change the wall color away from the gray tone.

something with a high LRV to lift the feel. You can always add in color with decor and textiles. SW Dover White is warm and doesn't have an undertone to fight with other colors, frees you up to do what you need to do to make the vanity work.

Nothing beats sample colors IN the room, AI wants to make everything work, but doesn't always.

Thank you Lyn. My sister in law recommends the SW White Dove also!

Consider tone wall and vanity color. Your tile and floor already have the greige tones (from the photo).

Make sure your lighting (and bulbs) are installed before deciding the wall color. I think @Maureen has given you amazing advice. It will look gorgeous.
I also have “to the floor” vanities and love them.

Second RedRyder's recommendation on waiting on wall color until after lighting is installed.

I’d make sure you’re able to easily vacuum under that vanity. I agree with moving away from grey. Good luck.

Thank you all for the advice. Meghan, I will ask the builder to make sure there is at least four inches of leg space to the ground. I have a vacuum that can go under. RedRyder, I am ok with the 'to the floor' vanities also, except I had water damage behind that wall and did not discover it until it had gotten bad. The freestanding vanities look more modern and I think I can monitor for moisture easier. Thank you again, everyone.